Steps
1. Toast the bread cubes in a dry skillet over medium heat until golden and crisp, about 5 minutes. Set aside.
2. In a small bowl, whisk together olive oil, red wine vinegar, Dijon mustard, salt, and pepper to create the dressing.
3. Place the sliced onions in a bowl and toss with half of the dressing to soften the sharpness.
4. Combine the toasted bread cubes, marinated onions, and chopped parsley in a salad bowl.
5. Drizzle the remaining dressing over the salad and toss gently to combine.
6. Let the salad sit for 5 minutes before serving to allow flavors to meld.